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Old 03-10-2009, 02:10 PM
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h22a overheating

Hey guys. My fans seem to be coming on very late (the bar before the red zone on the digital reader, sometimes it hits red). I did a swap from h23 to an h22a and i'm starting to think that when I replaced my thermostat a few months ago the mechanic probably used a thermostat from the USDM h22 engine instead of JDM.

I am hearing that the JDM thermo is a lot bigger. I'm almost positive that this is the problem and it's not my fan sensor or any electric problem.

I just want to get some opinions and also if possible, where can i buy a JDM thermostat for this engine.

Thanks!
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Old 03-10-2009, 03:06 PM
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Re: h22a overheating

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Originally Posted by runtingz View Post
Hey guys. My fans seem to be coming on very late (the bar before the red zone on the digital reader, sometimes it hits red). I did a swap from h23 to an h22a and i'm starting to think that when I replaced my thermostat a few months ago the mechanic probably used a thermostat from the USDM h22 engine instead of JDM.

I am hearing that the JDM thermo is a lot bigger. I'm almost positive that this is the problem and it's not my fan sensor or any electric problem.

I just want to get some opinions and also if possible, where can i buy a JDM thermostat for this engine.

Thanks!

I can't see the thermostat actually being any larger for a JDM H22, but maybe he replaced it with the wrong temperature thermostat. Did you tell him the car was motor swapped?

**EDIT**
Please tell me you did check the radiator and overflow
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Old 03-10-2009, 03:20 PM
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Re: h22a overheating

yeah I checked the radiator and cap for everything. Hmm..i thought maybe it would be the fact that it wasn't the thermostat from the JDM H22. People are saying that it is bigger...but your saying it shouldn't really make a difference right?
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Old 03-11-2009, 05:32 PM
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Re: h22a overheating

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Originally Posted by runtingz View Post
yeah I checked the radiator and cap for everything. Hmm..i thought maybe it would be the fact that it wasn't the thermostat from the JDM H22. People are saying that it is bigger...but your saying it shouldn't really make a difference right?
I could be wrong, but I don't see the JDM h22 and USDM h22 having a big difference in thermostat sizing. Even if it is, thermostats are a .99 cent part, and a 10 minute install. You can try replacing it yourself and see how it comes out.

Also, free bump. If anyone else can think of something please feel free to join in
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Old 03-11-2009, 09:07 PM
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Re: h22a overheating

Smokey..thanks a lot for your input bro. I'll try it out.

I realized something else today because I had to use the car a lot in stop and go traffic. The fan does the usual, comes on very late (sometimes to the red point) and when it does come on, it runs for a couple of seconds and turns off.

Even when I hit the A/C on and both fans come on, they stay on for couples of seconds and then come off...then will come back on for a couple and come off.

Does this make sense? let me know people...sorry for the annoyance! Thanks in advanced.
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Old 03-11-2009, 09:12 PM
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Re: h22a overheating

mugen thermostat and fan switch. problem solved.
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Old 03-11-2009, 09:18 PM
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Re: h22a overheating

I did hear that mugen thermostat solves everything, but ****..its like 80 bucks. lol... Fan switch? You mean the relay switch?
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Old 03-11-2009, 10:41 PM
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Re: h22a overheating

i think its your fan switch... usually a sign of them going bad is that they read inaccurately and cause the fans to kick on late or not at all... also make sure you do not have an air bubble in the coolant system. not many people know how to truly bleed the coolant system on honda motors.
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Old 03-12-2009, 12:10 AM
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Re: h22a overheating

the fan switch.
my guess is that its busted and not sensing the right pressure to turn on the fans.
that or just jam the aircon 24/7
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Old 03-12-2009, 01:10 AM
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Re: h22a overheating

Thanks Bustr for the input, my wikiHonda friend.

Yeah man,i hit the AC the minute it goes up one bar from normal. LOL

Is the relay switch and the fan switch the same thing? Because i changed that 5 months ago along with the thermostat.
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Old 03-12-2009, 01:12 AM
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Re: h22a overheating

the relay i believe is in the fuse box and then the sensor is in the bottom of the radiator.
looks like a big copper nut...
and yeah.
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Old 03-12-2009, 01:22 AM
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Re: h22a overheating

Damn that girl is cute in your sig...

So the fan switch and relay switch are the same? Sorry man...im a bit slow right now. Thanks for your speed responses!!
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Old 03-12-2009, 05:25 AM
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Re: h22a overheating

i told you already
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Old 03-12-2009, 09:56 AM
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Re: h22a overheating

thanks a lot for that last post man...
im guessing your next post to this would be "your welcome"

bump this thread one last time.
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Old 03-12-2009, 09:59 AM
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Re: h22a overheating

hmmm no you got it wrong my friend.
why dont you try it out and if it fixes your problem.
come back post the results and then tell us your conclusion.

comprende?
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Old 03-12-2009, 10:37 AM
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Re: h22a overheating

...I would but I would like to know if the switch and relay are the samething. As i stated before, i changed the relay but if the switch is not the same and it is some thing else I would rather change that first...
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Old 03-12-2009, 10:43 AM
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Re: h22a overheating

over heating, this might not be the problem but your fans help cooling but there really not needed, if your driving theres constant air over your raidator still pushing the heat out, ive had a fan not work before and the temp never went up, i think you have a small head gasket leak from the sounds of things or wrong therostat. BUT thats just IMO
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Old 03-12-2009, 12:12 PM
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Re: h22a overheating

Thanks for the post. I hope it's not the head gasket. My car doesn't show any leaks or white smoke anywhere. I was thinking about getting the Mugen Thermo and Switch but I hear when it gets cold (im in NY) the engine take a while to warm up. One guy said he had it and he drove around for 40 minutes and the car still did not warm up.
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Old 03-12-2009, 01:57 PM
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Re: h22a overheating

ahhh Cold ass NY, i was there this winter in 0 degree weather, emm its 80 in fl atm :)
but replace your thermostat first. Are you getting any CEL?
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Old 03-12-2009, 02:01 PM
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Re: h22a overheating

Quote:
Originally Posted by Bustr View Post
i think its your fan switch... usually a sign of them going bad is that they read inaccurately and cause the fans to kick on late or not at all... also make sure you do not have an air bubble in the coolant system. not many people know how to truly bleed the coolant system on honda motors.

i thoguht honda are verry well with getting rid of coolant bubbles? but he dose have a good point about the bubble
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Old 03-12-2009, 04:05 PM
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Re: h22a overheating

No CEL's at all. Car doesn't over use coolant neither.

In the winter, when im on the highway sometimes the engine temp goes down a notch (not in the middle but the bar before that). When it's really cold and im on the highway, the temp would go all the way down to cold. That only happened 3 times though.

Hopefully that info I forgot to include would help.
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Old 03-12-2009, 04:10 PM
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Re: h22a overheating

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Originally Posted by bdizzel124 View Post
over heating, this might not be the problem but your fans help cooling but there really not needed, if your driving theres constant air over your raidator still pushing the heat out, ive had a fan not work before and the temp never went up, i think you have a small head gasket leak from the sounds of things or wrong therostat. BUT thats just IMO
yea dude, i got a JDM swap H22 and my fan switch is broken, so i have my fan wired on a toggle switch to turn it on.....i turn it on in the summer time when its real hot out just because...... but ive yet to have it overheat or even get close to the red zone even if i dont turn on the fan, it can idle forever and not overheat without the fan......sounds like a water pump or head gasket, to me not a fan or thermostat problem....
but......
did u premix ur coolant correctly?..sounds dumb but my truck overheated one time cause i filled the block and radiator with striaght antifreeze first then added water after thinking it would be okay...but it got get waaaay to hot and would overheat...had to drain it down and refill it with premixed coolant it was fine.....
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Old 03-12-2009, 04:16 PM
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Re: h22a overheating

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Originally Posted by runtingz View Post
No CEL's at all. Car doesn't over use coolant neither.

In the winter, when im on the highway sometimes the engine temp goes down a notch (not in the middle but the bar before that). When it's really cold and im on the highway, the temp would go all the way down to cold. That only happened 3 times though.

Hopefully that info I forgot to include would help.
well sh*t....this changes everything

are u sure its not the temp sensor reading inaccurate?
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Old 03-12-2009, 04:21 PM
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Re: h22a overheating

I don't think it's the temp sensor. Then again, i never tested it out. Don't know how I can go about doing so.
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Old 03-12-2009, 04:40 PM
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Re: h22a overheating

did it do that with the old motor also?

when it is in the red zone does the engine feel like it really is overheating? can u put ur hand on the top of the motor or top radiator hoses?

there are ray/temperture guns out on the market...any good car mechanic should have one,(I do, lol) see if u can borrow one...all u do is point it at the motor and it tells u how the temp its running...
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Old 03-12-2009, 04:43 PM
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Re: h22a overheating

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Originally Posted by EvilBird View Post
did u premix ur coolant correctly?..sounds dumb but my truck overheated one time cause i filled the block and radiator with striaght antifreeze first then added water after thinking it would be okay...but it got get waaaay to hot and would overheat...had to drain it down and refill it with premixed coolant it was fine.....
and if does feel like it is hot how bout this^^^^
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Old 03-12-2009, 04:45 PM
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Re: h22a overheating

did it do that with the old motor also?

when it is in the red zone does the engine feel like it really is overheating? can u put ur hand on the top of the motor or top radiator hoses?

there are ray/temperture guns out on the market...any good car mechanic should have one,(I do, lol) see if u can borrow one...all u do is point it at the motor and it tells u how the temp its running...

and if does feel like it is hot how bout this
[QUOTE=EvilBird;250689]
did u premix ur coolant correctly?..sounds dumb but my truck overheated one time cause i filled the block and radiator with striaght antifreeze first then added water after thinking it would be okay...but it got get waaaay to hot and would overheat...had to drain it down and refill it with premixed coolant it was fine.....[/QUOTE/]

sorry for the double posts please delete mods
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Old 03-12-2009, 05:29 PM
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Re: h22a overheating

wow didn't know they had temp guns like that.

I never did that because the minute i see red zone I hit the a/c or turn off. My old motor never gave me this problem. Ever since I had the h22 Ive been getting this. The only reason why it's an issue now is because I do a lot more stop and go commuting than highway.

As I said before it overheats when i am still or in traffic. Thanks a lot for your feedback bro!
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Old 03-12-2009, 05:37 PM
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Re: h22a overheating

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Originally Posted by runtingz View Post
wow didn't know they had temp guns like that.

I never did that because the minute i see red zone I hit the a/c or turn off. My old motor never gave me this problem. Ever since I had the h22 Ive been getting this. The only reason why it's an issue not because I do more stop and go commuting than highway.

As I said before it overheats when i am still or in traffic. Thanks a lot for your feedback bro!
no problem ive had overheating issues with other cars......well with everything u have said
i would start by changing the thermostat cus its cheap...then i would drain the old coolant and flush the radiator and block and put brand new coolant in....

..if it still overheats and the fans wont come on or stay on i would just put ur fan on a toggle switch temporarly under the hood.....if it still overheats with the fan on while ur idling...i would say u need a water pump

hope this helps
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Old 03-12-2009, 05:42 PM
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Re: h22a overheating

Cool, i'll try that out this Friday/weekend. Thanks!
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